well, you know, we have testimonyings, cyber technologies, prevention technologies. we spend a lot of time now looking at detection technologies. but, again, if we ever got the kind of attack that hurt our critical infrastructure to which the president referred, we also are pretty good on resiliency, redundancy and response and recovery programs like we did with hurricane sandy. peept dumont is president and ceo of the air traffic control association. mr. dumont, your answer to that question. >> guest: there have been some attacks on the system. ta abt becau it'spublicized and confidential information and, obviously, you don't want too many people to know how the air traffic control system works. it's difficult to explain air traffic control in a sound bite. it's happened up in alaska, and what's being done now is we have very ancient infrastructure for air traffic control. it's been around since late '50s, early '60s, and it's a mix of different equipment. so it's very insecure. right now we're in a modernization phase where we're modernizing, moving from a land-bas